One of the sky's rarest phenomena is back: How to see rare night-shining clouds this summer

Rare noctilucent clouds shine above the city of Kennewick in Washington State June 2. (Image credit: John Clement.)

Noctilucent cloud season has officially begun!

One of the earliest sightings was captured by photographer John Clement, glowing in the skies over the city of Kennewick, Washington, on June 2, who had set out to capture a striking conjunction of Venus and Jupiter, which had occurred earlier that evening.